Kent · England
Window & door mastic in Leadingcross Green, Kent
Mastic around window and door frames, sills and patio doors for Leadingcross Green, backed by a 12-month guarantee. Ask us for a quote.
- Mastic that has split away from the wall
- Draughty joints inside around the window
- White mastic on grey or black frames
What happens on the day
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of frames, longer for a whole house and we leave things clean and tidy. In a small place like Leadingcross Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Mention any tricky access
- Try not to wet indoor joints just before the visit
- Move anything stored near the joints
How to get a quote
Every job is quoted individually. Simply phone 0345 464 0079 or send us an email and describe the job, and pictures are welcome.
Advice
How we handle window mastic in Leadingcross Green
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. If you have mastic that’s falling out in pieces and draughts coming in around windows and doors, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Leadingcross Green is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- Leadingcross Green (ME17)
- Region
- Kent
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Leadingcross Green homes and the weather
With historic houses such as Leeds Castle (about 3.6 miles west) nearby, there’s older building stock in the area around Leadingcross Green as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Lenham Primary School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Lenham station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. If you live in an older home near St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Leadingcross Green is about 8 miles south of Sittingbourne, in Kent. Every kind of property in Leadingcross Green can book us for window mastic. The work is guaranteed for a year. Leadingcross Green is one of 922 places in Kent we cover for window mastic. You can also see our page for Chelmsford, about 36 miles away.
Here we cover the ME17 postcode area for window mastic. Whether your property is on Headcorn Road and Boughton Road or anywhere close by, we can help. We also cover Lenham (1 mile north), Lenham Forstal (2 miles south-east), Woodside Green (2 miles north-east), West Street (2 miles north-east) and Lenham Heath (2 miles south-east). Within a short drive, we also cover Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (8 miles north), Faversham (10 miles north-east), Minster (14 miles north) and Kings Hill (13 miles west).
Near you in Leadingcross Green
Around Leadingcross Green, our work takes us to homes and buildings near Wishful Thinker pub, Kiln Wood and The Lenham School, among other places. Leadingcross Green has its own railway station: Lenham station. Nearby you will also find Coldbridge Castle (2.3 miles south) and The Dog Collar Museum (3.5 miles west).
Honest limits
It helps to know what we can’t do too:
- Faulty window hardware
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Penetrating damp from a failed cavity tray or render
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Patio & French doors
- Composite doors
- Aluminium frames
- Window sills
- Timber windows & doors
- uPVC windows
Also near Leadingcross Green
Other services in Leadingcross Green
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep jet washers away from the mastic
- Check the mastic once a year
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
Silicone cannot normally be painted, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Questions from Leadingcross Green
Do you work for landlords with property near Lenham station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Do you cover smaller places like Leadingcross Green?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we’ll tell you.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
How much does window mastic cost in Leadingcross Green?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What happens if it’s left?
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Around Leadingcross Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why book with us
- A sealant colour to suit the surroundings
- Rated 4.9 stars on Google
- Tidy, careful work
- Anti-fungal sanitary silicone in wet areas
Take a look at how sealant jobs are priced and customer reviews.
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Access and height
- Which sealant suits the joint
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Asking for a quote
To help us quote quickly, let us know:
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or email us.